CN103199808B - A kind of intermodulation canceller for passive device - Google Patents
A kind of intermodulation canceller for passive device Download PDFInfo
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- CN103199808B CN103199808B CN201310048951.1A CN201310048951A CN103199808B CN 103199808 B CN103199808 B CN 103199808B CN 201310048951 A CN201310048951 A CN 201310048951A CN 103199808 B CN103199808 B CN 103199808B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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Abstract
The present invention relates to a kind of intermodulation canceller for passive device, comprise power coupler, adjustment module and nonlinear device, the input and output of described intermodulation canceller share a port, and described power coupler is coupled out and transmits from passive device through described input/output port; Described adjustment module and nonlinear device are processed for the first time to transmitting after described coupling respectively; After described processing for the first time, signal is after described intermodulation canceller end reflection, again process for the second time, the power signal that makes its generation contain the second intermodulation offseting signal, the second intermodulation offseting signal in described power signal and the inter-modulated signal transmitting in described passive device have identical frequency, level and contrary phase place; Transmitting in described power signal and passive device superposes and exports passive device to from input/output port. The present invention can offset the inter-modulated signal of passive device in whole working frequency range.
Description
Technical field
The present invention relates to the communications field. Specifically, the present invention relates to one for passiveThe intermodulation canceller of device.
Background technology
The passive devices such as emission filter, duplexer, combiner, power splitter at antenna feeder areIn system, application is more extensive. Antenna-feedback system is usually used in receiving path and transmitting path to close roadRear common antenna. In antenna-feedback system, the signal power of transmitting path is far longer than receptionPath, transmits and can produce through Passive Nonlinear device the inter-modulated signal that level is larger.In antenna end, inter-modulated signal falls into receive path, forms Intermodulation Interference, makes antenna-feedback systemCannot normally work. Therefore, require passive device in the time of work, transmission channel producesPassive intermodulation signal level is low as far as possible, in order to avoid inter-modulated signal falls into receive path, and dockingReceive passage and cause interference.
Documents CN100490307C disclose a kind of name be called " signal processing circuit,The method of base station and elimination intermodulation product " patent of invention, this patent will be inputted non-linear listThe primary carrier of unit is divided into two-way, inputs respectively two branch roads, and first via primary carrier is through non-Linear unit produces the processing signals that includes first group of intermodulation product, the second road primary carrierThrough shunt, frequency multiplier, blender and regulating circuit, produce and contain second group highThe control signal of inferior intermodulation product, finally superposes two paths of signals. It utilizes second group highInferior intermodulation product is identical with the frequency of first group of intermodulation product, and amplitude approaches identical, phase placeOn the contrary, offset inter-modulated signal.
This technical scheme has the following disadvantages: 1, this technical scheme is not suitable for passive device,It does not consider that the intermodulation value difference of the inner diverse location of non-linear unit is different, for passive deviceThis species diversity of part is clearly, in passive circuit, the amplitude fading of signal transmission andPhase place intensity of variation is very large, the in the situation that of producing intermodulation in multiple positions, and circuit front-endThe inter-modulated signal producing can significantly decay in signals transmission, and it is mutual that circuit is exportedTonal signal only contains the inter-modulated signal that circuit end produces, therefore, and for duplexer,If from the front end number of winning the confidence of non-linear unit, the intermodulation offseting signal producing cannot with skyThe inter-modulated signal of line cap offsets; 2, the intermodulation offseting signal that this technical scheme producesSecond group of high order intermodulation product, is restricted to the intermodulation product of fixing order, can only eliminate, there is limitation in the inter-modulated signal of the non-linear unit in corresponding frequency band.
In addition, existing other the method for reduction passive intermodulation signal level mainly collectsIn in structure and technique, these methods often need to increase extra cost, Er QieheLattice rate is wayward, and repair rate is higher.
Summary of the invention
One of object of the present invention is the deficiency in order to overcome above-mentioned background technology, provides onePlant simple in structure, the easy to operate intermodulation canceller for passive device. Can beIn whole working frequency range, offset the inter-modulated signal of passive device.
For achieving the above object, the present invention adopts following technical scheme: a kind of for passiveThe intermodulation canceller of device, comprises power coupler, adjustment module and nonlinear device,It is characterized in that, the input and output of described intermodulation canceller share a port and are called defeatedEnter output port, this input/output port is positioned on a port of power coupler; InstituteState power coupler and from passive device, include inter-modulated signal through described input/output portTransmit in be coupled out a very little part, the transmission signal level value after coupling is far lowInter-modulated signal before coupling and is wherein ignored; Described adjustment module and non-linear devicePart is processed for the first time to transmitting after described coupling respectively, through locating for the first timeAfter reason, produce the first intermodulation offseting signal by nonlinear device; After described processing for the first timeSignal, after described intermodulation canceller end reflection, passes through described nonlinear device againWith adjustment module respectively to transmitting and being produced by nonlinear device after described couplingThe first intermodulation offseting signal is processed for the second time, makes its generation contain the second intermodulation and offsetsThe power signal of signal, the second intermodulation offseting signal and described nothing in described power signalThe inter-modulated signal transmitting in the device of source has identical frequency, level and contrary phasePosition; Described power signal is the stack that transmits in power coupler and passive device againAnd export passive device to from input/output port.
Preferably, described intermodulation canceller is positioned at passive device antenna port, described meritRate coupler is from passive device antenna port coupling firing signal. At antenna portThe power signal being coupled to and passive device produce the exciting signal frequency phase of inter-modulated signalWith, to ensure in intermodulation offseting signal and passive device that this intermodulation canceller is producedInter-modulated signal contain identical frequency content, guarantee signal cancellation success.
Preferably, multiple intermodulation are set offsets in described passive device same antenna portDevice, produces Overlay to the inter-modulated signal in described transmitting. Multiple (comprisingMore than two and two) intermodulation canceller produces respectively multiple intermodulation offseting signals, manyAfter individual intermodulation offseting signal is superimposed, can offset with inter-modulated signal better.
Preferably, described power coupler is to be coupled and to send out in passive device transmit frequency bandPenetrate signal. Can be coupled to and transmit better.
Preferably, the coupling amount of described power coupler is between 16 ~ 60dB. Make itDo not affect the transmission of main signal.
Preferably, described nonlinear device function is: do not adding under the prerequisite of direct current biasing,In the time that input power is 0.01 milliwatt ~ 100 milliwatt, the intermodulation being produced by this nonlinear deviceSignal can reach than being cancelled slightly high-magnitude of signal, and this magnitude is 0.01 micromicrowatt ~ 100 micromicrowatt.Make its transmitting and receiving signal that needs minute quantity can produce intermodulation offseting signal.
Preferably, described adjustment module comprises phase regulator and power attenuator, described inPhase regulator transmits and is produced by nonlinear device after being used for adjusting described couplingThe phase place of the first intermodulation offseting signal; Described power attenuator is used for adjusting described couplingAfter transmit and the level of the first intermodulation offseting signal of being produced by nonlinear device.Make intermodulation offseting signal identical with inter-modulated signal level, single spin-echo.
Preferably, described power coupler, phase regulator, power attenuator and non-lineProperty produces device four kinds of devices and is electrically connected successively and forms intermodulation canceller, and described intermodulation is supportedEnd ground connection or the open circuit of device disappear. Making to transmit can be in intermodulation after processing for the first timeThe end reflection of canceller.
Two of the object of patent of the present invention is the deficiencies in order to overcome above-mentioned background technology, carriesFor a kind of duplexer that comprises above-mentioned intermodulation canceller, can be at duplexer antennaPort is eliminated the passive intermodulation signal of transmitting path, ensure antenna-feedback system receiving path andTransmitting path is normally worked.
For realizing this object, the present invention adopts following technical scheme: one comprises above-mentioned mutualThe duplexer of adjusting canceller, comprises emission port, receiving port and antenna port; ?Described antenna port is provided with intermodulation canceller, and described intermodulation canceller comprises power couplingClose device, adjustment module and non-linear generation device, is characterized in that, described intermodulation is offsetDevice input and output share a port and are called input/output port, this input/output terminalMouth is positioned on a port of power coupler; Described power coupler is defeated through described inputOutbound port from duplexer, include in transmitting of inter-modulated signal, be coupled out very little onePoint, the inter-modulated signal front far below coupling and wherein of the transmission signal level value after coupling is neglectedSlightly disregard; Described adjustment module and non-linear generation device are respectively to sending out after described couplingPenetrating signal processes for the first time; After processing for the first time, produced by nonlinear deviceThe first intermodulation offseting signal, after described processing for the first time, signal is at described intermodulation cancellerAfter end reflection, again pass through described nonlinear device and adjustment module respectively to described couplingThe the first intermodulation offseting signal that transmits and produced by nonlinear device after closing carries outAfter-treatment, the power signal that makes its generation contain the second intermodulation offseting signal, described in makingThe intermodulation transmitting in the second intermodulation offseting signal in power signal and described duplexerSignal has identical frequency, level and contrary phase place; Described power signal is again through meritTransmitting and receiving signal stack in rate coupler and duplexer is also exported from input/output portTo duplexer.
Preferably, described intermodulation canceller is positioned at duplexer antenna port, described powerCoupler receives signal from duplexer antenna port coupling firing.
Preferably, multiple intermodulation are set in described duplexer same antenna port and offset dressPut, the inter-modulated signal in described transmitting is produced to Overlay.
Preferably, described power coupler is from coupling firing in duplexer transmit frequency bandSignal.
Preferably, the coupling amount of described power coupler is between 16 ~ 60dB.
Preferably, described nonlinear device function is: do not adding under the prerequisite of direct current biasing,In the time that input power is 0.01 milliwatt ~ 100 milliwatt, the intermodulation being produced by this nonlinear deviceSignal can reach than being cancelled slightly high-magnitude of signal, and this magnitude is 0.01 micromicrowatt ~ 100 micromicrowatt.Preferably, described adjustment module comprises phase regulator and power attenuator, described phase placeAdjuster for adjust transmit after described coupling and produced by nonlinear device theThe phase place of one intermodulation offseting signal; Described power attenuator is sent out after being used for adjusting described couplingThe level of the first intermodulation offseting signal of penetrating signal and produced by nonlinear device.
Preferably, described power coupler, phase regulator, power attenuator and non-lineProperty produces device four kinds of devices and is electrically connected successively and forms intermodulation canceller, and described intermodulation is supportedEnd ground connection or the open circuit of device disappear.
Three of the object of patent of the present invention is the deficiencies in order to overcome above-mentioned background technology, carriesFor a kind of method of eliminating passive device intermodulation offseting signal, make it can be at working frequency rangeEliminate the inter-modulated signal of passive device, be not subject to the restriction of fixing order, do not affect again passiveThe normal work of device, ensures that receiving path and the transmitting path of antenna-feedback system normally worked.
For realizing this object, the present invention adopts following technical scheme: the passive device of a kind of eliminationThe method of part intermodulation offseting signal, the method comprises the steps:
1) offset electricity by including transmitting of inter-modulated signal in passive device in intermodulationIn road, be coupled out a very little part, the transmission signal level value after coupling is far below before being coupledAnd inter-modulated signal is wherein ignored;
2) intermodulation canceller transmitting after to described coupling processed for the first time,The first power signal that makes its generation contain the first intermodulation offseting signal;
3) described the first power signal is on described intermodulation canceller end reflection Hou Yuan roadReturn, intermodulation canceller transmitting after to described coupling processed for the second time,The second power signal that makes its generation contain the second intermodulation offseting signal, described the second powerThe intermodulation letter transmitting in the second intermodulation offseting signal in signal and described passive deviceNumber there is identical frequency, level and contrary phase place;
4) by the transmitting and receiving signal stack in described the second power signal and passive deviceAnd export passive device to from intermodulation canceller.
Preferably, the transmitting and receiving signal in described passive device also includes and produces mutuallyThe identical signal of exciting signal frequency of tonal signal. With the intermodulation offseting signal that ensures to produceContain identical frequency content with inter-modulated signal.
Preferably, described intermodulation bucking circuit is to be coupled in passive device transmit frequency bandTransmitting and receiving signal. Can be coupled to and transmit better.
Preferably, the coupling amount of the transmitting and receiving signal of described intermodulation bucking circuit coupling isBetween 16 ~ 60dB. Make it not affect the transmission of main signal.
The generating principle of intermodulation offseting signal of the present invention is: when two different frequenciesWhen signal passes through nonlinear device, can produce new frequency signal, these new frequencies lettersNumber be exactly intermodulation product. The frequency of intermodulation product is only relevant with the frequency of two input signals,Irrelevant with the nonlinear degree of device, therefore, as long as the frequency of input signal is constant,The frequency of intermodulation product is identical. The amplitude that the amplitude of intermodulation product is mainly subject to input signal withAnd the impact of the nonlinear degree of nonlinear device, the amplitude of input signal is higher, and intermodulation is producedThe amplitude of thing is higher, and the nonlinear degree of nonlinear device is higher, the amplitude of intermodulation productHigher, vice versa.
When two radio frequency signal frequency are identical, amplitude is equal, when phase phasic difference 180 is spent,Two radiofrequency signals can be cancelled out each other in transmitting procedure.
In passive device of the present invention, transmit through passive device at antennaEnd produces and includes transmitting of inter-modulated signal, includes transmitting of inter-modulated signalInput intermodulation canceller of the present invention. Intermodulation canceller can be coupled very little by oneTransmitting of part, the transmission transmitting in order not affect passive device Central Plains, couplingResultant is between 16 ~ 60dB, and the power transmitting being coupled out is less than former transmitting letterNumber power 2.5%, concrete performance number, changes with the variation of former transmit signal power.Wherein, inter-modulated signal can be ignored. After phase place adjustment and power attenuation, use thisPart transmits and promotes a non-linear very strong nonlinear device, produces one and comprisesHave the power signal of intermodulation offseting signal, this power signal is anti-at the circuit end of this deviceAfter penetrating, again pass through nonlinear device, phase regulator and power attenuator, generationThe level that the level of power signal transmits much smaller than antenna end, intermodulation offseting signal withInter-modulated signal frequency, level equate, phase phasic difference 180 is spent. At the antenna of passive deviceEnd, the power signal of above-mentioned generation by power coupler with transmit superimposedly, supportDisappear inter-modulated signal and minute quantity transmits, thus reduce passive device in the time of work byThe interference of the inter-modulated signal that transmitting path produces to receiving path. Wherein, signal processingStep: phase place adjustment, power attenuation order are not limit; The journey of phase place adjustment and power attenuationDegree is according to phase place and the level of passive intermodulation signal, adopt adjustable or arrange fixed value orTwo kinds of method realizations that mode matches.
The present invention has overcome the deficiency of prior art scheme, is coupled out transmitting letter from antenna endNumber, do not affect the normal work of passive device; The intermodulation offseting signal producing, and twoThe inter-modulated signal correlation of multiplexer itself is high, can in whole working frequency range, realize counteracting.
Intermodulation canceller of the present invention, all works under passive states, does not needTo additionally power, reduce circuit complexity, improve reliability, and reduce cost.
Intermodulation canceller of the present invention, input/output port is a port,When installation, shared volume is little, can not exert an influence to the topology layout of former passive device.
Intermodulation canceller of the present invention is equal with inter-modulated signal level by producing,The intermodulation offseting signal that phase phasic difference 180 is spent, the level of reduction passive intermodulation signal. ByPhase place and level in intermodulation offseting signal all can be by phase regulator and power attenuatorsRegulate, the qualification rate of product is easily controlled, cost, has important to productionMeaning.
Patent of the present invention is mainly used in the intermodulation counteracting of passive device in addition, with documentCN100490307C invention disclosed patent is compared, and does not need extra power supply, and cost is lower.
Brief description of the drawings
Fig. 1 is that intermodulation canceller of the present invention is specifically applied to showing of duplexer embodimentIntention.
Fig. 2 is intermodulation canceller embodiment schematic diagram of the present invention.
Fig. 3 be described in Fig. 1 in embodiment the intermodulation principle of cancellation of intermodulation canceller 5 showIntention.
Fig. 4 is that embodiment adds before and after intermodulation canceller, at working frequency range described in Fig. 1The situation of change of interior intermodulation value.
Detailed description of the invention
Embodiment, as shown in Figure 1, the present embodiment relates to one intermodulation counteracting dress has been installedPut 5 duplexer 1, this duplexer 1 comprises antenna port 2, and emission port 3 receivesPort 4. Duplexer 1, in the time of work, transmits and enters duplexer 1 from emission port 3,After signal is processed, launch from antenna port 2, meanwhile, antenna port 2 can connectReceive reception signal, receive signal and enter duplexer 1 from antenna port 2, through signal placeAfter reason, export from receiving port 4. Because the signal power of transmitting path is far longer than receptionPath, the inter-modulated signal being caused by Passive Nonlinear at antenna port 2 can be fallen to receive and lead toRoad, forms Intermodulation Interference, and antenna-feedback system cannot normally be worked. Therefore, require duplexDevice 1 is in the time of work, and the passive intermodulation level that transmission channel produces is low as far as possible, in order to avoid mutuallyTonal signal falls into receive path frequency range, and receive path is caused to interference. Described intermodulation is supportedThe device 5 that disappears is used for eliminating the passive intermodulation signal that transmission channel produces.
Intermodulation canceller 5 described in the present embodiment is positioned at the antenna port 2 of duplexer 1Near, 5 input and output of intermodulation canceller share a port and are called input/output terminalMouthful, intermodulation canceller 5 is connected with the antenna port 2 of duplexer 1 by this port.The input signal of intermodulation canceller 5 is transmitting of antenna port 2, is and comprisesThere is transmitting of inter-modulated signal; Output signal is the transmitting letter that contains intermodulation offseting signalNumber. The output signal of intermodulation canceller 5 outputs to passive by its input/output portThe antenna port 2 of device 1 carries out previously described subsequent treatment.
In the present embodiment, intermodulation canceller 5 is positioned at the antenna port 2 of duplexer 1, onlyThere are the power signal ability and the duplexer that are coupled at antenna port 2 to produce swashing of inter-modulated signalEncourage signal frequency identical, like this intermodulation offseting signal for offsetting, just meeting and duplexerThe inter-modulated signal producing, do similar variation, otherwise change of frequency is offset unsuccessfully with frequency.
Fig. 2 is the structure chart of intermodulation canceller 5 in above-described embodiment. As shown in Figure 2,Intermodulation canceller 5 is by power coupler 6, phase regulator 7, power attenuator 8 HesNonlinear device 9 orders are composed in series, the end ground connection of nonlinear device 9. Power couplingClose device 6 for coupled power signal in transmit frequency band, its version comprises but does not limitIn micro-band, probe, coupling rings etc. have the structure of power coupling effect, in order not affectThe transmission of main signal, the coupling amount of this power coupler is between 16 ~ 60dB, i.e. couplingTo signal power be less than 2.5% of original signal power, concrete performance number, with original signal meritThe variation of rate and changing. The version of phase regulator 7 includes but not limited to that micro-band passesDefeated line, cable transmission line, and external phase shifter. Nonlinear device 9 is by non-linearStrong device forms, in the situation that not adding direct current biasing, in low input powerUnder, produce poor inter-modulated signal, for example, when input power is 0.01 milliwatt ~ 100 milliwattTime, the inter-modulated signal being produced by nonlinear device can reach 0.01 micromicrowatt ~ 100 micromicrowatt. ShouldNonlinear device can be the nonlinear devices such as diode, triode or ferrite, and this is non-Linear unit includes but not limited to above-mentioned three kinds of devices.
Referring to Fig. 3, in the present embodiment, the power signal during passive device transmits is10, the inter-modulated signal producing through Passive Nonlinear device that transmits is 11. IncludeThe input intermodulation canceller 5 that transmits of inter-modulated signal 11 and power signal 10. PowerCoupler 6 is coupled out very little a part of power signal 12, and the power of power signal 12 is less than2.5% of the power of power signal 10, concrete performance number, with power signal 10 powerChange and change. After phase regulator 7 and power attenuator 8, power signal 12Become power signal 13. Power signal 13, producing after device 9 by high intermodulation, producesIntermodulation offseting signal 14. Power signal 13 and intermodulation offseting signal 14 reflect at earth terminalAfter, again produce device 9, power attenuator 8 and phase regulator 7 through too high intermodulation,Power signal 13 becomes power signal 15, and intermodulation offseting signal 14 becomes intermodulation and offsets letterNumbers 16. Now the frequency of intermodulation offseting signal 16 and inter-modulated signal 11, amplitude equate,Phase phasic difference 180 is spent; Power signal 15 is identical with power signal 10 frequencies, phase place phaseDiffer from 180 degree, and level is much smaller than power signal 10. Last power signal 15 and intermodulation are supportedDisappear signal 16 through power couplers 6 respectively with inter-modulated signal 11 and power signal 10 phasesStack. Wherein intermodulation offseting signal 16 is cancelled out each other with inter-modulated signal 11, thereby reducesThe power level of inter-modulated signal; Power signal 10 is balanced out very little by one by power signal 15After part, become power signal 17, because the level of power signal 10 is much larger than signal 15,Power signal 17 is approximate identical with power signal 10, and intermodulation canceller is to transmitting powerImpact can ignore.
The present embodiment is identical with duplexer inter-modulated signal frequency by one of generation, amplitude phaseDeng, the intermodulation offseting signal that phase phasic difference 180 is spent, offset duplexer inter-modulated signalLevel, thus the Intermodulation Interference of transmission channel to receive path reduced. Phase place is adjusted and meritThe degree of rate decay, according to phase place and the level of passive intermodulation signal, adopts adjustable or establishesPut fixed value or two kinds of method realizations that mode matches. Phase regulator 7, power attenuationThe order of connection of device 8 is not limited to the present embodiment, can adjust arbitrarily.
In addition, the present embodiment is only provided with one at antenna port 2 places of described duplexer 1Individual intermodulation canceller 5, also can arrange at antenna port 2 places multiple intermodulation cancellers,Make it produce multiple intermodulation offseting signals, stack up and offset the inter-modulated signal of passive device.
For checking effect of the present invention, applicant is to adding this enforcement of front and back of intermodulation cancellerThe intermodulation value of the described duplexer of example is measured, and measures comparing result as shown in Figure 4, fromIn Fig. 4, can find out, in working frequency range 1730MHz ~ 1760MHz, not add mutuallyAdjust canceller, be greater than-104dBm of intermodulation value, add intermodulation canceller after intermodulation value littleIn-113dBm, intermodulation value has at least reduced 9dB in whole working frequency range. The above resultsProve that intermodulation principle of cancellation of the present invention is correct feasible.
The present invention also can apply to the intermodulation of other passive device and offset, as power splitter, and couplingClose device, wave filter, and antenna etc.
In sum, the present invention, compared with background technology, can carry out inter-modulated signal levelRegulate, qualification rate is easily controlled, cost, significant to producing.
Claims (20)
1. for an intermodulation canceller for passive device, comprise power coupler, adjustJoint module and nonlinear device, is characterized in that the input and output of described intermodulation cancellerShare a port and be called input/output port, this input/output port is positioned at power couplingClose on a port of device; Described power coupler through described input/output port from passiveIn device, include in the transmitting of inter-modulated signal and be coupled out a very little part, after couplingTransmission signal level value far below coupling before and inter-modulated signal wherein ignore; InstituteState adjustment module transmitting after to described coupling and process for the first time, locate for the first timeSignal after reason produces the first intermodulation offseting signal by nonlinear device; Process for the first timeAfter signal and the first intermodulation offseting signal after described intermodulation canceller end reflection,Again process for the second time through described adjustment module, make its generation contain the second intermodulationThe power signal of offseting signal, the second intermodulation offseting signal and institute in described power signalState the inter-modulated signal transmitting in passive device and there is identical frequency, level and contraryPhase place; Described power signal exports to passive through power coupler from input/output portDevice, with the stack that transmits in passive device.
2. a kind of intermodulation canceller for passive device according to claim 1,It is characterized in that, described intermodulation canceller is positioned at passive device antenna port, described meritRate coupler is from passive device antenna port coupling firing signal.
3. a kind of intermodulation canceller for passive device according to claim 2,It is characterized in that, multiple intermodulation are set in described passive device same antenna port and offsetDevice, produces Overlay to the inter-modulated signal in described transmitting.
4. a kind of intermodulation canceller for passive device according to claim 1,It is characterized in that, described power coupler is from coupling firing in passive device transmit frequency bandSignal.
5. a kind of intermodulation canceller for passive device according to claim 1,It is characterized in that, the coupling amount of described power coupler is between 16～60dB.
6. a kind of intermodulation canceller for passive device according to claim 1,It is characterized in that, described nonlinear device function is: do not adding under the prerequisite of direct current biasing,In the time that input power is 0.01 milliwatt～100 milliwatt, the intermodulation being produced by this nonlinear deviceSignal can reach than being cancelled slightly high-magnitude of signal, and this magnitude is 0.01 micromicrowatt～100 micromicrowatt.
7. a kind of intermodulation canceller for passive device according to claim 1,It is characterized in that, described adjustment module comprises phase regulator and power attenuator, described inPhase regulator is for adjusting transmitting and being produced by nonlinear device after described couplingThe phase place of the first raw intermodulation offseting signal; Described power attenuator is used for adjusting described couplingThe electricity of the first intermodulation offseting signal that transmits and produced by nonlinear device after closingFlat.
8. a kind of intermodulation canceller for passive device according to claim 7,It is characterized in that described power coupler, phase regulator, power attenuator and non-lineProperty device four kinds of devices be electrically connected successively and form intermodulation canceller, dress is offset in described intermodulationEnd ground connection or the open circuit put.
9. one kind comprises in claim 1-8 intermodulation canceller described in arbitrary claimDuplexer, comprise emission port, receiving port and antenna port; In described antenna endMouth is provided with intermodulation canceller, and described intermodulation canceller comprises power coupler, regulatesModule and nonlinear device, is characterized in that, the input and output of described intermodulation canceller altogetherBe called input/output port with a port, this input/output port is positioned at power couplingOn a port of device; Described power coupler through described input/output port from duplexerIn include in the transmitting of inter-modulated signal and be coupled out a very little part, sending out after couplingPenetrating signal level value inter-modulated signal front far below coupling and wherein ignores; Described tuneJoint module transmitting after to described coupling processed for the first time; After processing for the first timeSignal produce the first intermodulation offseting signal by nonlinear device, after treatment for the first timeSignal and the first intermodulation offseting signal are after described intermodulation canceller end reflection, againProcess for the second time through described adjustment module, make its generation contain the second intermodulation and offsetThe power signal of signal, make the second intermodulation offseting signal in described power signal with described inThe inter-modulated signal transmitting in duplexer has identical frequency, level and contrary phasePosition; Described power signal exports duplexer through power coupler to from input/output port,With the stack that transmits in duplexer.
10. a kind of duplexer according to claim 9, is characterized in that, described inIntermodulation canceller is positioned at duplexer antenna port, and described power coupler is from duplexerAntenna port place coupling firing signal.
11. a kind of duplexers according to claim 9, is characterized in that, in instituteState duplexer same antenna port multiple intermodulation cancellers are set, to described transmitting letterInter-modulated signal in number produces Overlay.
12. a kind of duplexers according to claim 9, is characterized in that, described inPower coupler from coupling firing signal in duplexer transmit frequency band.
13. a kind of duplexers according to claim 9, is characterized in that, described inThe coupling amount of power coupler be between 16～60dB.
14. a kind of duplexers according to claim 9, is characterized in that, described inNonlinear device function is: do not adding under the prerequisite of direct current biasing, when input power is 0.01When milliwatt～100 milliwatts, the inter-modulated signal being produced by this nonlinear device can reach than being supportedThe signal that disappears is high-magnitude slightly, and this magnitude is 0.01 micromicrowatt～100 micromicrowatt.
15. a kind of duplexers according to claim 9, is characterized in that, described inAdjustment module comprises phase regulator and power attenuator, and described phase regulator is for adjustingThe first intermodulation that transmits and produced by nonlinear device after whole described coupling is offsetThe phase place of signal; Described power attenuator for adjust after described coupling transmit withAnd the level of the first intermodulation offseting signal being produced by nonlinear device.
16. a kind of duplexers according to claim 9, is characterized in that, described inPower coupler, phase regulator, power attenuator and four kinds of devices of nonlinear device are complied withInferior electrical connection forms intermodulation canceller, the end ground connection of described intermodulation canceller or openRoad.
Eliminate the method for passive device intermodulation offseting signal for 17. 1 kinds, the method comprise asLower step:
1) the transmitting in intermodulation bucking circuit of inter-modulated signal will be included in passive deviceIn be coupled out a very little part, the transmission signal level value after coupling far below coupling before andInter-modulated signal is wherein ignored;
2) intermodulation canceller transmitting after to described coupling processed for the first time,The first power signal that makes its generation contain the first intermodulation offseting signal;
3) described the first power signal returns on described intermodulation canceller end reflection Hou Yuan roadReturn, the signal of intermodulation canceller after to described reflection processed for the second time, makes its productRaw the second power signal that contains the second intermodulation offseting signal, in described the second power signalThe second intermodulation offseting signal and described passive device in the inter-modulated signal that transmits haveIdentical frequency, level and contrary phase place;
4) export described the second power signal to passive device from intermodulation canceller, withThe stack that transmits in passive device.
18. a kind of passive device intermodulation offseting signals of eliminating according to claim 17Method, it is characterized in that, described intermodulation canceller is from passive device transmitting frequentlyThe interior coupling firing signal of section.
19. a kind of passive device intermodulation offseting signals of eliminating according to claim 17Method, it is characterized in that the coupling transmitting of described intermodulation canceller couplingAmount is between 16～60dB.
20. a kind of passive device intermodulation offseting signals of eliminating according to claim 17Method, it is characterized in that, utilize phase regulator to adjust transmitting after described coupling letterNumber and the phase place of the first intermodulation offseting signal of being produced by nonlinear device; Utilize powerAttenuator adjust after described coupling transmit and produced by nonlinear device firstThe level of intermodulation offseting signal.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310048951.1A CN103199808B (en) | 2013-02-07 | 2013-02-07 | A kind of intermodulation canceller for passive device |
| PCT/CN2013/074762 WO2014121560A1 (en) | 2013-02-07 | 2013-04-26 | Intermodulation cancellation apparatus for passive component |
| EP13874802.5A EP2955862B1 (en) | 2013-02-07 | 2013-04-26 | Intermodulation cancellation apparatus for passive component |
| KR1020157024400A KR101702094B1 (en) | 2013-02-07 | 2013-04-26 | Intermodulation cancellation apparatus for passive component |
| US14/819,460 US20150349819A1 (en) | 2013-02-07 | 2015-08-06 | Intermodulation cancellation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310048951.1A CN103199808B (en) | 2013-02-07 | 2013-02-07 | A kind of intermodulation canceller for passive device |
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| Publication Number | Publication Date |
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| CN103199808A CN103199808A (en) | 2013-07-10 |
| CN103199808B true CN103199808B (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310048951.1A Active CN103199808B (en) | 2013-02-07 | 2013-02-07 | A kind of intermodulation canceller for passive device |
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| Country | Link |
|---|---|
| US (1) | US20150349819A1 (en) |
| EP (1) | EP2955862B1 (en) |
| KR (1) | KR101702094B1 (en) |
| CN (1) | CN103199808B (en) |
| WO (1) | WO2014121560A1 (en) |
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| US9319916B2 (en) | 2013-03-15 | 2016-04-19 | Isco International, Llc | Method and appartus for signal interference processing |
| EP3076558B1 (en) | 2013-12-17 | 2019-05-08 | Huawei Technologies Co., Ltd. | Method and device for reducing intermodulation interference |
| US9775116B2 (en) | 2014-05-05 | 2017-09-26 | Isco International, Llc | Method and apparatus for increasing performance of communication links of cooperative communication nodes |
| EP3651386B1 (en) | 2015-05-04 | 2023-08-23 | ISCO International, LLC | Method and apparatus for increasing the performance of communication paths for communication nodes |
| JP6356345B2 (en) * | 2015-05-14 | 2018-07-11 | 株式会社Ｎｔｔドコモ | Multiband array antenna |
| CN106788784B (en) * | 2015-11-25 | 2020-07-10 | 西安交通大学 | Dynamic passive intermodulation reference signal generator |
| US10652835B2 (en) | 2016-06-01 | 2020-05-12 | Isco International, Llc | Signal conditioning to mitigate interference impacting wireless communication links in radio access networks |
| EP3516777B1 (en) * | 2016-09-21 | 2020-07-01 | Telefonaktiebolaget LM Ericsson (publ) | Pim compensation at a transmitter's radio frequency port |
| US10298279B2 (en) | 2017-04-05 | 2019-05-21 | Isco International, Llc | Method and apparatus for increasing performance of communication paths for communication nodes |
| US10812121B2 (en) | 2017-08-09 | 2020-10-20 | Isco International, Llc | Method and apparatus for detecting and analyzing passive intermodulation interference in a communication system |
| US10284313B2 (en) | 2017-08-09 | 2019-05-07 | Isco International, Llc | Method and apparatus for monitoring, detecting, testing, diagnosing and/or mitigating interference in a communication system |
| CN108777585B (en) * | 2018-02-09 | 2020-07-10 | 香港梵行科技有限公司 | Device and method for self-adaptively counteracting passive intermodulation signal in wireless transceiving system |
| CN109495127B (en) * | 2018-09-27 | 2021-09-03 | 香港梵行科技有限公司 | Device and method for self-adaptively counteracting passive intermodulation signal and application equipment |
| CN109995385B (en) * | 2018-09-29 | 2021-09-14 | 香港梵行科技有限公司 | Device and method for self-adaptively counteracting passive intermodulation signal |
| WO2020113928A1 (en) * | 2018-09-29 | 2020-06-11 | 香港梵行科技有限公司 | Apparatus and method for adaptively cancelling passive intermodulation signals |
| CN212542673U (en) * | 2019-09-30 | 2021-02-12 | 3M创新有限公司 | Wireless communication system |
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- 2013-04-26 WO PCT/CN2013/074762 patent/WO2014121560A1/en active Application Filing
- 2013-04-26 KR KR1020157024400A patent/KR101702094B1/en active IP Right Grant
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2955862A4 (en) | 2016-11-16 |
| EP2955862A1 (en) | 2015-12-16 |
| EP2955862B1 (en) | 2019-12-25 |
| KR101702094B1 (en) | 2017-02-02 |
| US20150349819A1 (en) | 2015-12-03 |
| CN103199808A (en) | 2013-07-10 |
| KR20150119002A (en) | 2015-10-23 |
| WO2014121560A1 (en) | 2014-08-14 |
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